A.Gooseneck vents
B.Flame screens
C.Pressure vacuum relief valves
D.Forced draft blowers
第1题
A.exerted by liquid cargo on the sides of a tank
B.exerted by liquid cargo on a cargo hose body
C.the lowest temperature and pressure that will cause a flammable liquid to give off vapors
D.a measurement of the amount of flammable vapors given off by a liquid at a certain temperature
第2题
A.purging with hydrocarbon gas
B.gas-freeing operations
C.maintaining an inert condition
D.full line draining and mopping up of any water
第3题
A.Diminishing the height of the seas
B.Lengthening the distance between successive crests
C.Increasing the height of the seas
D.Preventing the wave crests from breaking
第4题
A.Clear syrupy liquid with no odor
B.Colorless-to-brown liquid with a choking odor when hot
C.Colorless liquid with a pleasant fruity odor
D.Whitish liquid with a faint,pleasant odor
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